John schade and frank bell case



J. SCHADE 8v P. B. CASE. 1.00K.

Patented Jan. 21, 1890.

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JOHN SCHADE AND FRANK BELL OASE,f OF BROOKLYN, NEW' YORK. Y

Lock.'

SPECIFICATION forming part of Letters Patent No. 419,890, dated January 21, 1890. Application led February 27, 1889. Serial No. 301,386. (Model.)

.others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Figure l of the drawings is a representation of a perspective view of a lock illustrating our invention. Fig. 2 is a sectional view of the same in position in a thin door. Fig. 3 is a sectional view showing the lock attached toa thick door. Fig. 4 is a view of the key. Figs. 5 and 6 are details.

This invention has relation to door-locks wherein the latch-bcltis designed to be operated from the outside of the door by means of a notched key working in a cylindrical lock provided with `pin-tumblers; and the invention consists in the novel construction and combination of devices,all as hereinafter set forth.

In the accompanying drawings, the letter A designates the lock-case, and B the latchbolt therein, having lugs to engage the usual yoke-lever pivoted in the main wall A, and having the knob a, whereby it is operated from the inside of the door.

C is the cap of the lockcase, which is secured thereto by a screw passing into the spring-stud d. The cap C is provided with the hollow cylindrical bearing-lug D for the key-plug, said lug having the hollow oifset rib or pin-chamber E, the pin-bearings of which communicate with the chamber within the cylindrical lug D, the latter chamber receiving the key-plug c, the outer end of which is flanged to form a head h, extending over the end of the lug D. To the inner end of the' key-plug is secured the cam-'lug CZ, which is designed to engage a shoulder of the latchbolt' and draw said bolt when the key-plug is rotated. In the pin-chamber are the usual pin tuinblers and drivers, which, when the key is out of the slotted key-plug c, engage chambers by their outer ends and the key` plug by their inner ends. The bearing-lug D and its odset rib or pin chambers E are integral with the cap C and project therefrom at right angles in such` a manner that when the latch is applied to a door through which a cylindrical opening has been bored, as at e,

the lug portion will enter the opening, which forms a passage through which the key F may be inserted from the outside.

I-Ieretofore it has been the practice in pintumbler latch-locks to have a separate escutcheon, which, having its outer end flush with the door-surface, has been designed to reach into the bore in the door and has been secured to .the cap of the lock by screws reaching through the cap into ear-lugs of this escutcheon, the connection between the' keyplug and the mechanism in the lock having been made by a separate connecting-bar, which has had to be cut off to suit varying thicknesses of doors.

In our invention we cast the pin-chamber and lug bearing on the cap, which is a plain plate and separable from the lock-case, and we have a much simpler and cheaper method of construction, and provide that iin case of injury to the pin-chamber and lug-bearin g the simple cap-plate and its lug will only have to be replaced.

Ve are aware that there have been drawlocks in which the pin-chambers and bearinglug have been made integral with the case of the lock, but such parts have never been made integral with the cap-plate.

In order to guard the lug and pin-chamber and facilitate its application to the bored ICO We are aware that a cylinder-band not having an integral escutcheon end has been made, and We do not claim such construction.

As the lug projection of the cap is dcsigned to be made' of uniform size in these latch-locks, it is apparent that in order to accommodate thin doors these lugs must be short, so that they will not project onvthe outside of the door. When, therefore, these latch-locks are applied to thicker doors, the lug projections will not extend to the outer surface of the door, but there will be between the end of the lug projection and said outer surface an interval, as at m, which may be of considerable extent. In order to guard this interval, and at the same time to provide a neat finish on the outer surface of the door, an independent escutcheon-plate L may be secured to the door at the outer end of the opening or passage e. This escutcheon-plate fis provided with an eccentric opening z,

through which the key is thrust to engage the slotted key-plug of the lock. The key F is therefore made with an extension J of'its shank between its bow or handle and the stopshonlder at the end of its notched portion,

n said extension being of sufficient length to hind the escutcheon-plate, it is provided with the stop-shoulder l, above referred to, at the commencement of the extended portion of the shank.

What We claim, and desire Letters Patent, is-

1. In a pin-tumbler lock, the cap-plate of the lock having integral therewith the cylinder bearing-lug D for the key-plug and the offset ping-chamber E, integral with said bearing-lug and cap, substantially as specified.

2. In a latch-lock, the combination, with the cap-plate, its cylindrical bearing-lug for the key-plug, and the offset pin-chamber, of the thimble C,having its integral escutcheon end provided with the eccentric opening to engage the end of the bearing-lug for said key-plug, substantially as specilied.

3. The combination,with a pin-tumbler lock having chambered lugs projecting from its cap-plate and the tumbler mechanism therein, of the shank-extended lkey having the shank-extension J between its bar andthe stop-shoulder, substantially asspecified.

In testimony whereof we affix our signatures in presenceof two witnesses.

JOI-IN SCHADE. FRANK BELL OASE.

to secure by Vitnesses:

JosEPH H. HALL, EGBERT S. Mo'rT. 

